Gluck [india] manufactures a wide range of chemical seal type diaphragm pressure gauges and are widely accepted by reputed consultants and organizations. These gauges are available in all ranges from vacuum to up to 400 kg/cm²; dial size from 63 to 150 mm; die cast aluminium; weatherproof; and ss weatherproof as per ip 65 housing with brass, ss 316 and phosphor bronze with diaphragm material of ss 316l, monel, hastelloy or tantalum, to suit the process requirement. The calibration offered is as per is 3624, accuracy of the gauges is ±1 percent , and over range protection is 20 percent as per is specifications. The diaphragm unit is designed in a manner that the diaphragm does not rupture even if the pressure goes above the specified over range protection limits and these units are used in the industries like chemical, bulk drugs, petrochemicals, pharmaceuticals and fertilizers where corrosive slurries or viscous fluids may be encountered in the process, which may clog or damage the pressure element offers traceable calibration certificates for iso purpose. Calibration inspection can be offered on budenberg dead weight testers which are the world best testers.